or_
between iron and iron, when close to the loadstone,
_within its orbe of virtue._

Magnet attracts magnet, not in every part and on every side with equal
conditions, as iron, but at one and a fixed point; therefore the poles of
both must be exactly disposed, otherwise they do not cleave together duly
and strongly. But this disposition is not easy and expeditious; wherefore a
loadstone seems not to conform to a loadstone, when nevertheless they agree
very well together. A piece of iron by the sudden impression of a loadstone
is not only allured by the stone, but is renewed, its forces being drawn
forth; by which it follows and solicits the loadstone with no less impulse,
and even leads another piece of iron captive. Let there be a small iron
spike above a loadstone clinging firmly to it; if you apply an unmagnetized
rod of iron to the spike, not, however, {95} so that it touches the stone,
you will see the spike when it has touched the iron, leaving the loadstone,
follow the rod, try to grasp it by leaning toward it, and (if it should
touch it) cleave firmly to it: for a piece of iron, when united and joined
to another piece of iron placed within the orbe of virtue of the loadstone,
draws it more strongly than does the loadstone itself. The natural
magnetick virtue, confused and dormant in the iron, is aroused by the
loadstone, is linked to the loadstone, and rejoices with it in its primary
form; then smelted iron becomes a perfect magnetick, as robust as the
loadstone itself. For as the one imparts and stirs, so the other conceives,
and being stirred remains in virtue, and pours back the forces also by its
own activity. But since iron is more like iron than loadstone, and the
virtue in both pieces of iron is exalted by the proximity of the loadstone,
so in the loadstone itself, in case of equal strength, likeness of
substance prevails, and iron gives itself up rather to iron, and they are
united by their very similar homogenic powers. Which thing happens not so
much from a coition, as from a firmer unition; and a knob or snout of
steel, fixed skilfully on the pole of the stone, raises greater weights of
iron than the stone of itself could. When steel or iron is smelted from
loadstone or iron ore, the slag and corrupt substances are separated from
the better by the fusion of the material; whence (in very large measure)
that iron contains the nature of the earth, purified from alien flaw and
blemish, and more homogenic